CN103526629B - Pulping process of waste paper with high wet strength - Google Patents
Pulping process of waste paper with high wet strength Download PDFInfo
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- CN103526629B CN103526629B CN201310504684.4A CN201310504684A CN103526629B CN 103526629 B CN103526629 B CN 103526629B CN 201310504684 A CN201310504684 A CN 201310504684A CN 103526629 B CN103526629 B CN 103526629B
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- 239000010893 paper waste Substances 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000004537 pulping Methods 0.000 title claims abstract description 20
- 239000002002 slurry Substances 0.000 claims abstract description 69
- 239000000835 fiber Substances 0.000 claims abstract description 39
- 238000012545 processing Methods 0.000 claims description 36
- 238000005406 washing Methods 0.000 claims description 20
- 229920001131 Pulp (paper) Polymers 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000006185 dispersion Substances 0.000 claims description 8
- 238000011161 development Methods 0.000 abstract description 3
- 206010035148 Plague Diseases 0.000 abstract 1
- 241000607479 Yersinia pestis Species 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 32
- 239000004155 Chlorine dioxide Substances 0.000 description 16
- 235000019398 chlorine dioxide Nutrition 0.000 description 16
- 239000003599 detergent Substances 0.000 description 12
- 235000013336 milk Nutrition 0.000 description 12
- 239000008267 milk Substances 0.000 description 12
- 210000004080 milk Anatomy 0.000 description 12
- 229920002472 Starch Polymers 0.000 description 11
- 235000019698 starch Nutrition 0.000 description 11
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 9
- 238000005520 cutting process Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 4
- 238000012216 screening Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920002522 Wood fibre Polymers 0.000 description 2
- 238000004061 bleaching Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 150000002896 organic halogen compounds Chemical class 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 241000609240 Ambelania acida Species 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002761 deinking Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000002803 maceration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
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Abstract
本发明公开了一种高湿强度废纸的制浆工艺，包括以下步骤：（1）将高湿强度废纸处理成8～10cm×2～3cm的纸料，用ClO2进行处理；（2）将上述经过ClO2处理的纸料通过水力碎浆机进行常规疏解；（3）将上述疏解后的浆料进行第二段ClO2处理；（4）上述经过第二段ClO2处理的浆料经过高频疏解机进行常规疏解；（5）将上述疏解后的浆料通过真空洗浆机进行洗涤；（6）上述洗涤后的浆料通过压力筛进行筛选，得到纤维分散好的废纸浆料。本发明改善了高湿强度废纸纤维的制浆性能，提高了纤维的回收利用率，使高湿强度废纸的利用价值大大提高，可解决困扰我国造纸工业发展的资源和环境问题。The invention discloses a high-wet-strength waste paper pulping process, which comprises the following steps: (1) treating the high-wet-strength waste paper into 8-10 cm×2-3 cm paper stock, and treating it with ClO 2 ; (2) ) The above-mentioned paper stock treated with ClO 2 is conventionally decomposed by a hydropulper; (3) The above-mentioned decomposed pulp is subjected to the second stage of ClO 2 treatment; (4) The above-mentioned pulp treated with the second stage of ClO 2 (5) Wash the above-mentioned pulp after being decompressed by a vacuum pulp washer; (6) Screen the above-mentioned washed pulp through a pressure sieve to obtain waste paper with dispersed fibers slurry. The invention improves the pulping performance of high-wet-strength waste paper fibers, improves the recycling rate of fibers, greatly increases the utilization value of high-wet-strength waste paper, and can solve resource and environmental problems that plague the development of my country's paper industry.
Description
Technical field
The present invention relates to the pulping process of wet strong waste paper, particularly relate to a kind of pulping process of high wet strength waste paper.
Background technology
At present, China is the first in the world pulping and paper-making producing country, but there is the problem of forest reserves scarcity in China, cause pulping and paper-making fibre resources wretched insufficiency, thus China uses non-wood-fiber (as wheat straw, bagasse, reed etc.) to carry out pulping and paper-making in a large number, recycle domestic waste paper and from a large amount of waste paper of external import, to solve the problem of China's fibre resources wretched insufficiency simultaneously.Day by day perfect along with Waste Paper Recycle Technique, waste paper has received the concern of countries in the world as a kind of fibre resources.In recent years, because in China's waste paper, grass fiber ratio is higher, fiber recovery utilization rate was lower, and fiber quality is poor, and thus the more good imported waste papers (as high wet strength waste paper) of fiber quality receive the favor of papermaking enterprise.The paper of high wet strength waste paper is pure, filler is few, without deinking, and raw fiber composition is the good needle-leaved wood fibre of quality and cotton pulp fiber, this type of waste paper can be joined through the fiber of slurrying reuse and copied high-grade paper kind, thus, the slurrying again of high wet strength waste paper fibre utilizes the very big attention having obtained papermaking enterprise, and has good development and application prospect.
The wet strength of general high wet strength paper is higher than its dry strength by more than 30%, this adds increased the recovery difficult of wet strong waste paper fibre.Traditional wet strong waste paper fibre process for reclaiming has Mechanical Method, thermochemical method and Re Fa, there is the problems such as energy consumption is high, process waste water poisonous organohalogen compounds (AOX) content is high, dispersion effect difference discongested by fiber, fiber recovery utilization rate is low in these methods, thus limits the reuse of wet strong waste paper fibre.Therefore need to research and develop the pulping process being applicable to wet strong waste paper, discongest dispersion effect difference, problem that fiber recovery utilization rate is low, to improve the value of wet strong waste paper to solve wet strong waste paper.
Summary of the invention
For above-mentioned prior art, in order to improve the pulpability of high wet strength waste paper, improving the utilization rate of its fibre resources, the invention provides one ClO
2the pulping process of process high wet strength waste paper, thus solve high wet strength waste paper fibre and discongest dispersion effect difference, problem that fiber recovery utilization rate is low.
The present invention is achieved by the following technical solutions:
A pulping process for high wet strength waste paper, adopts chlorine dioxide (ClO
2) carry out double diffusion, then the mechanical force high efficiency dispersion of hydrabrusher and defiberizing machine is utilized to discongest fiber, the secondary stock that fiber dispersion is good and whiteness is high is obtained after screening, thus improve the pulpability of high wet strength waste paper, improve paper pulp yield, increase the value of high wet strength waste paper fibre.Specifically comprise the following steps:
(1) in order to improve the uniformity of slurrying, high wet strength waste paper being processed into the paper stock of 8 ~ 10cm × 2 ~ 3cm through paper cutter, using ClO
2carry out processing (first paragraph ClO
2preliminary treatment), utilize ClO
2strong oxidizing property carry out wet extensive chemical medicament in oxidation dissolution waste paper and destroy the hydrogen bond formed between fiber, thus make waste paper fibre be easy to discongest and be dispersed into paper pulp; Processing mode is: by ClO
2join in slurry, with NaOH solution adjust ph to 4 ~ 5, under the condition of 50 ~ 70 DEG C, carry out first paragraph ClO
2preliminary treatment;
(2) by above-mentioned through ClO
2the paper stock of process carries out routine by hydrabrusher and discongests;
(3) slurry after above-mentioned discongesting is carried out second segment ClO
2process, processes under 50 ~ 70 DEG C of conditions (using NaOH solution adjust ph) with pH value 4 ~ 5;
(4) above-mentioned through second segment ClO
2the slurry of process carries out routine through deflaker and discongests;
(5) slurry after above-mentioned discongesting is washed by vacuum pulp washing machine;
(6) slurry after above-mentioned washing is screened by pressurized screen, obtains the waste paper pulp that fiber dispersion is good.
In described step (1), carry out first paragraph ClO
2pretreated parameter is: the slurry of paper stock is dense is 5wt%, ClO
2consumption is 1 ~ 1.5%, and the processing time is 50 ~ 70min.
In described step (2), the parameter discongested is: the slurry of slurry is dense is 5wt%, and the time of discongesting is 60min.
In described step (3), carry out second segment ClO
2the parameter of process is: the slurry of slurry is dense is 5wt%, ClO
2consumption is 0.5%, and the processing time is 10 ~ 20min.
In described step (4), the parameter that deflaker carries out discongesting is: the slurry of slurry is dense is 4wt%, and the time of discongesting is 10min.
In described step (5), when vacuum pulp washing machine washs, the slurry of slurry is dense is 2.5wt%, and wash time is 30min.
In described step (6), when pressurized screen screens, the slurry of slurry is dense is 4wt%, and sieve seam width is 0.3mm.
The pulping process of high wet strength waste paper of the present invention, high wet strength waste paper is after cutting, and carry out two sections of impregnation process with chemicals, discongest after impregnation process completes, the slurry after discongesting enters washing and screening operation.Conventional waste paper pulp-making technology first adopts clorox (NaClO) to process, and then carries out discongesting of wastepaper as raw material.In the present invention, adopt strong oxidizer chlorine dioxide in conjunction with mechanical force to high wet strength Waste Paper Handling, through two sections of chlorine dioxide treatment in conjunction with mechanical force, carry out dispersion fully to high wet strength waste paper fibre to discongest, obtain secondary stock through washing and screening again, secondary stock can be delivered directly to copy paper operation and carry out copy paper.
The invention has the beneficial effects as follows:
(1) by chlorine dioxide to the dipping of high wet strength wastepaper as raw material and hydrabrusher, the mechanical force of defiberizing machine, weaken the self-crosslinking of wet strength agent self and the co-crosslinking effect between wet strength agent and fiber, be conducive to the removal of wet strength agent in wastepaper as raw material, improve the efficiency of mechanical force, reduce energy consumption;
(2) by the maceration of chlorine dioxide, reduce chemicals consumption in high wet strength Waste Paper Handling, reduce production cost;
(3) chlorine dioxide is a kind of strong oxidizer, is the main drift agent in pulp and paper industry cleaning and bleaching operation, while to wet strength agent effect, paper pulp raw material is had to the effect of bleaching purification;
(4) present invention improves the pulpability of high wet strength waste paper fibre, improve the recovery utilization rate of fiber, the value of high wet strength waste paper is improved greatly, the resources and environment problem of puzzlement China Paper Industry Development can be solved.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further illustrated.
Apart from outside special instruction, all percentages involved in embodiment are mass percent.
Embodiment of the present invention high wet strength waste paper used is imported from America high wet strength Waste paper strip, and whiteness is 76.2%ISO.
Embodiment 1 high wet strength waste paper utilization tradition pulping process carries out slurrying
High wet strength waste paper carries out slurrying according to the following steps after cut paper:
1. high wet strength waste paper is after cutting, and with clorox one section process, treatment conditions are temperature 65 ~ 75 DEG C, time 70min, and pH value 1 ~ 3, NaClO consumption 3%, starches dense 5%;
2. by processing gained waste paper material in above-mentioned steps 1, discongested by hydrabrusher, condition of discongesting is for slurry dense 5%, time 60min;
3. discongested by deflaker by the slurry processing gained in above-mentioned steps 3, discongesting slurry dense is 4%;
4. washed by vacuum pulp washing machine by the slurry processing gained in above-mentioned steps 4, detergent milk is dense is 2.5%;
5. washed by vacuum pulp washing machine by the slurry processing gained in above-mentioned steps 5, detergent milk is dense is 4%, is then screened by pressurized screen again, and sieve seam width is 0.3mm, obtains wet strong secondary stock.
Result: through Performance Detection, the secondary stock whiteness 78.9%ISO of above-mentioned conventional processing steps gained, yield 89.2%, length 1.049mm.
Embodiment 2 high wet strength waste paper utilization pulping process of the present invention carries out slurrying
High wet strength waste paper carries out slurrying according to the following steps after cut paper:
1. high wet strength waste paper is after cutting, carries out first paragraph process with chlorine dioxide, and treatment conditions are temperature 50 ~ 55 DEG C, time 50min, pH value 4 ~ 5, ClO
2consumption 1%, starches dense 5%;
2. by processing gained waste paper material in above-mentioned steps 1, discongested by hydrabrusher, condition of discongesting is for slurry dense 5%, time 60min;
3. the slurry processing gained in above-mentioned steps 2 is carried out second segment chlorine dioxide treatment, treatment conditions are temperature 50 ~ 55 DEG C, time 10min, pH value 4 ~ 5, ClO
2consumption 0.5%, starches dense 5%;
4. discongested by deflaker by the slurry processing gained in above-mentioned steps 3, discongesting slurry dense is 4%, and the time is 10min;
5. washed by vacuum pulp washing machine by the slurry processing gained in above-mentioned steps 4, detergent milk is dense is 2.5%, and the time is 30min;
6. washed by vacuum pulp washing machine by the slurry processing gained in above-mentioned steps 5, detergent milk is dense is 4%, is then screened by pressurized screen again, and sieve seam width is 0.3mm, obtains wet strong secondary stock.
Result: through Performance Detection, the secondary stock whiteness 82.1%ISO of above-mentioned treatment step gained, yield 97.1%, length 1.083mm.Compared with the secondary stock (embodiment 1) of the conventional NaClO process under same treatment process conditions, pulp brightness improves 4.1%ISO, and paper pulp yield improves 8.9%, and average fiber length improves 3.2%.
Embodiment 3 high wet strength waste paper utilization pulping process of the present invention carries out slurrying
High wet strength waste paper carries out slurrying more according to the following steps after cut paper:
1. the high wet strength waste paper after cutting first carries out first paragraph chlorine dioxide treatment, and treatment conditions are temperature 60 ~ 70 DEG C, time 50min, pH value 4 ~ 5, ClO
2consumption 1%, starches dense 5%;
2. by processing gained waste paper material in above-mentioned steps 1, discongested by hydrabrusher, condition of discongesting is for slurry dense 5%, time 60min;
3. the slurry processing gained in above-mentioned steps 2 is carried out second segment chlorine dioxide treatment, treatment conditions are temperature 60 ~ 70 DEG C, time 10min, pH value 4 ~ 5, ClO
2consumption 0.5%, starches dense 5%;
4. discongested by deflaker by the slurry processing gained in above-mentioned steps 3, discongesting slurry dense is 4%, and the time is 10min;
5. washed by vacuum pulp washing machine by the slurry processing gained in above-mentioned steps 4, detergent milk is dense is 2.5%, and the time is 30min;
6. washed by vacuum pulp washing machine by the slurry processing gained in above-mentioned steps 5, detergent milk is dense is 4%, is then screened by pressurized screen again, and sieve seam width is 0.3mm, obtains wet strong secondary stock.
Result: through Performance Detection, the secondary stock whiteness 84.2%ISO of above-mentioned treatment step gained, yield 96.5%, length 1.078mm.Compared with the secondary stock of the conventional NaClO process under same treatment process conditions, pulp brightness improves 7.5%, and paper pulp yield improves 8.2%, and average fiber length improves 2.8%.
Embodiment 4 high wet strength waste paper utilization pulping process of the present invention carries out slurrying
The strong waste paper of high humidity carries out slurrying more according to the following steps after cut paper:
1. the strong waste paper of the high humidity after cutting first carries out first paragraph chlorine dioxide treatment, and treatment conditions are temperature 60 ~ 70 DEG C, time 60min, pH value 4 ~ 5, ClO
2consumption 1%, starches dense 5%;
2. by processing gained waste paper material in above-mentioned steps 1, discongested by hydrabrusher, condition of discongesting is for slurry dense 5%, time 60min;
3. carry out second segment chlorine dioxide treatment by processing gained slurry in above-mentioned steps 2, treatment conditions are temperature 60 ~ 70 DEG C, time 20min, pH value 4 ~ 5, ClO
2consumption 0.5%, starches dense 5%;
4. discongested by deflaker by the slurry processing gained in above-mentioned steps 3, discongesting slurry dense is 4%, and the time is 10min;
5. washed by vacuum pulp washing machine by the slurry processing gained in above-mentioned steps 4, detergent milk is dense is 2.5%, and the time is 30min;
6. washed by vacuum pulp washing machine by the slurry processing gained in above-mentioned steps 5, detergent milk is dense is 4%, is then screened by pressurized screen again, and sieve seam width is 0.3mm, obtains wet strong secondary stock.
Result: through Performance Detection, the secondary stock whiteness 84.8%ISO of above-mentioned treatment step gained, yield 95.9%, length 1.072mm.Compared with the secondary stock of the conventional NaClO process under same treatment process conditions, pulp brightness improves 8.5%, and paper pulp yield improves 7.5%, and average fiber length improves 2.2%.
Embodiment 5 high wet strength waste paper utilization pulping process of the present invention carries out slurrying
High wet strength waste paper carries out slurrying more according to the following steps after cut paper:
1. the high wet strength waste paper after cutting first carries out first paragraph chlorine dioxide treatment, and treatment conditions are temperature 60 ~ 70 DEG C, time 60min, pH value 4 ~ 5, ClO
2consumption 1.5%, starches dense 5%;
2. by processing gained waste paper material in above-mentioned steps 1, discongested by hydrabrusher, condition of discongesting is for slurry dense 5%, time 60min;
3. the slurry processing gained in above-mentioned steps 2 is carried out second segment chlorine dioxide treatment, treatment conditions are temperature 60 ~ 70 DEG C, time 20min, pH value 4 ~ 5, ClO
2consumption 0.5%, starches dense 5%;
4. discongested by deflaker by the slurry processing gained in above-mentioned steps 3, discongesting slurry dense is 4%, and the time is 10min;
5. washed by vacuum pulp washing machine by the slurry processing gained in above-mentioned steps 4, detergent milk is dense is 2.5%, and the time is 30min;
6. washed by vacuum pulp washing machine by the slurry processing gained in above-mentioned steps 5, detergent milk is dense is 4%, is then screened by pressurized screen again, and sieve seam width is 0.3mm, obtains wet strong secondary stock.
Result: through Performance Detection, the secondary stock whiteness 85.9%ISO of above-mentioned treatment step gained, yield 93.2%, length 1.062mm.Compared with the secondary stock of the conventional NaClO process under same treatment process conditions, pulp brightness improves 10.3%, and paper pulp yield improves 4.5%, and average fiber length improves 1.2%.
Embodiment 6 high wet strength waste paper utilization pulping process of the present invention carries out slurrying
High wet strength waste paper carries out slurrying more according to the following steps after cut paper:
1. the high wet strength waste paper after cutting first carries out first paragraph chlorine dioxide treatment, and treatment conditions are temperature 50 ~ 55 DEG C, time 70min, pH value 4 ~ 5, ClO
2consumption 1%, starches dense 5%;
2. by the waste paper material of process in above-mentioned steps 1, discongested by hydrabrusher, condition of discongesting is for slurry dense 5%, time 60min;
3. the slurry processing gained in above-mentioned steps 2 is carried out second segment chlorine dioxide treatment, treatment conditions are temperature 50 ~ 55 DEG C, time 20min, pH value 4 ~ 5, ClO
2consumption 0.5%, starches dense 5%;
4. discongested by deflaker by the slurry processing gained in above-mentioned steps 3, discongesting slurry dense is 4%, and the time is 10min;
5. washed by vacuum pulp washing machine by the slurry processing gained in above-mentioned steps 4, detergent milk is dense is 2.5%, and the time is 30min;
6. washed by vacuum pulp washing machine by the slurry processing gained in above-mentioned steps 5, detergent milk is dense is 4%, is then screened by pressurized screen again, and sieve seam width is 0.3mm, obtains wet strong secondary stock.
Result: through Performance Detection, the secondary stock whiteness 83.3%ISO of above-mentioned treatment step gained, yield 96.1%, length 1.073mm.Compared with the secondary stock of the conventional NaClO process under same treatment process conditions, pulp brightness improves 6.1%, and paper pulp yield improves 7.8%, and average fiber length improves 2.3%.
Claims (1)
1. a pulping process for high wet strength waste paper, is characterized in that: comprise the following steps:
(1) high wet strength Waste Paper Handling is become the paper stock of 8 ~ 10cm × 2 ~ 3cm, use ClO
2process, processing mode is: by ClO
2join in slurry, with NaOH solution adjust ph to 4 ~ 5, under the condition of 50 ~ 70 DEG C, carry out first paragraph ClO
2preliminary treatment;
(2) by above-mentioned through ClO
2the paper stock of process carries out routine by hydrabrusher and discongests;
(3) slurry after above-mentioned discongesting is carried out second segment ClO
2process, processes under 50 ~ 70 DEG C of conditions with pH value 4 ~ 5;
(4) above-mentioned through second segment ClO
2the slurry of process carries out routine through deflaker and discongests;
(5) slurry after above-mentioned discongesting is washed by vacuum pulp washing machine;
(6) slurry after above-mentioned washing is screened by pressurized screen, obtains the waste paper pulp that fiber dispersion is good;
In described step (1), carry out first paragraph ClO
2pretreated parameter is: the slurry of paper stock is dense is 5wt%, ClO
2consumption is 1 ~ 1.5%, and the processing time is 50 ~ 70min;
In described step (2), the parameter discongested is: the slurry of slurry is dense is 5wt%, and the time of discongesting is 60min;
In described step (3), carry out second segment ClO
2the parameter of process is: the slurry of slurry is dense is 5wt%, ClO
2consumption is 0.5%, and the processing time is 10 ~ 20min;
In described step (4), the parameter that deflaker carries out discongesting is: the slurry of slurry is dense is 4wt%, and the time of discongesting is 10min;
In described step (5), when vacuum pulp washing machine washs, the slurry of slurry is dense is 2.5wt%, and wash time is 30min;
In described step (6), when pressurized screen screens, the slurry of slurry is dense is 4wt%, and sieve seam width is 0.3mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104947490A (en) * | 2014-03-24 | 2015-09-30 | 上海嘉龙纸业有限公司 | Regeneration method of special wastepaper and application of regenerated special wastepaper |
| CN104164805B (en) * | 2014-06-27 | 2017-01-18 | 南京林业大学 | A method of enhancing papermaking wet-end paper strength by applying betaine amphoteric cellulose |
| CN106337311A (en) * | 2015-07-11 | 2017-01-18 | 陈福堂 | Extraordinary wet-strength paper processing auxiliary agent and application method thereof |
| CN107881847A (en) * | 2017-12-29 | 2018-04-06 | 安徽宏实光机电高科有限公司 | A kind of method using wet strong waste paper manufacture regenerated paper pulp wrapping paper |
| CN115976867B (en) * | 2023-01-11 | 2024-07-05 | 广东华凯科技股份有限公司 | Composition capable of rapidly dissociating wet strength paper, and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1396139A (en) * | 1971-11-10 | 1975-06-04 | Hooker Chemical Corp | Bleaching of waste paper pulp |
| JPH05125684A (en) * | 1991-11-05 | 1993-05-21 | Nippon Kakoh Seishi Kk | Reclamation of waste paper containing toner ink |
| JP2000027085A (en) * | 1998-07-10 | 2000-01-25 | Oji Paper Co Ltd | Method for producing bleached pulp from waste paper |
| CN102230291A (en) * | 2011-06-16 | 2011-11-02 | 黑龙江省造纸研究所有限公司 | Method for removing fluorescent substance in waste paper pulp |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929088B (en) * | 2009-06-24 | 2012-05-30 | 中国制浆造纸研究院 | Waste paper pulping method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1396139A (en) * | 1971-11-10 | 1975-06-04 | Hooker Chemical Corp | Bleaching of waste paper pulp |
| JPH05125684A (en) * | 1991-11-05 | 1993-05-21 | Nippon Kakoh Seishi Kk | Reclamation of waste paper containing toner ink |
| JP2000027085A (en) * | 1998-07-10 | 2000-01-25 | Oji Paper Co Ltd | Method for producing bleached pulp from waste paper |
| CN102230291A (en) * | 2011-06-16 | 2011-11-02 | 黑龙江省造纸研究所有限公司 | Method for removing fluorescent substance in waste paper pulp |
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